body{
    width: 100%;
    height: 100%;
}
header{
    height: 44px;
    line-height: 44px;
    text-align: center;
}
main{
    background: url(../img/advertisement-bg.jpg) no-repeat top center;
    background-size: 1280px;
}
.skip{
    width: 105px;
    height: 40px;
    line-height: 40px;
    font-size: 14px;
    background-color: #fff;
    border-radius: 20px;
    text-align: center;
    position: fixed;
    top:74px;
    right: 14px;
    span{
        margin:0 5px;
    }
}
.slogan{
    width:100%;
    height: 64px;
    font-size:40px;
    text-align: center;
    color: #fff;
    font-family: SourceHanSansSC-bold;
    text-align: center;
    position: fixed;
    bottom:100px;
    opacity: 0;
    animation: slogan 2s linear forwards;
}
@keyframes slogan{
    0%{
        bottom: 250px;
        scale:0;
    }
    75%{
        scale:0.5;
    }
    80%{
        scale:0.7;
    }
    90%{
        scale: 0.9;
    }
    100%{
        bottom: 100px;
        opacity: 1;
        scale:1;
    }
}